From 35e79ca1bfe294324e860504d5ba56f174c0d77c Mon Sep 17 00:00:00 2001
From: Bart Van Der Meerssche <bart.vandermeerssche@flukso.net>
Date: Tue, 15 Feb 2011 22:52:46 +0100
Subject: [PATCH] [avr] double-check the ACO to protect against spikes on the
 sensing circuit

---
 mote/v2/avr/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mote/v2/avr/main.c b/mote/v2/avr/main.c
index 38ffe2d..a5254f9 100644
--- a/mote/v2/avr/main.c
+++ b/mote/v2/avr/main.c
@@ -241,6 +241,9 @@ ISR(TIMER1_COMPA_vect)
 
 ISR(ANALOG_COMP_vect)
 {
+	if (!(ACSR & (1 << ACO)))
+		return;
+	
 	disable_led();
 
 	event.brown_out++;